Long Term Operation of Constructed Wetlands for Treatment of Fish and Swimming Ponds

Authors: Van Hulle, S.W.H.; Eeckhout, S. Van Den; Decoster, M.L.; Drouillon1, M.; Goemaere, K.; De Bo, I.

Source: Proceedings of the Water Environment Federation, WEFTEC 2009: Session 21 through Session 30 , pp. 1585-1593(9)

Publisher: Water Environment Federation

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Abstract:

A constructed wetland treating water from a fish pond was operated for 2.5 years. During this period COD concentration, suspended solids concentration, ammonium concentration, nitrate concentration, phosphate concentration, pH, turbidity, conductivity and oxygen concentration were monitored during 2 measurement campaigns (October-December 2005 and February-May 2008). Between these 2 periods the constructed wetland was operated at a hydraulic loading rate (HLR) of 6 m/d without any control. Comparison of measurement data obtained after 2.5 years of operation with the allowable limits imposed by the Flemish government reveals that without specific control these limits can be met. Further the optimal hydraulic loading rate was determined to be 6 m/d, which is higher than most other studies reported in literature. The results of the study suggest that the long term performance of constructed wetlands for swimming and fishing ponds can be guaranteed.

Keywords: Constructed wetland; Long term operation; Recirculating aquaculture system

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709793956400

Publication date: January 1, 2009

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